COMBINED HEAT SYSTEM WITH CLOSED LOOP FOR RECUPERATION OF WASTE HEAT AND ITS OPERATING METHOD Russian patent published in 2015 - IPC F01K23/06 

FIELD: heating.

SUBSTANCE: invention relates to systems with a heat cycle for recuperation of waste heat. A waste heat recuperation system includes Brayton cycle system (12) (BCS). BCS (12) includes heater (16) intended for circulation of carbon dioxide steam at heat exchange with hot fluid medium for heating of carbon dioxide steam, and the first turbine (18) connected to the heater and intended for expansion of carbon dioxide steam. Besides, BCS (12) includes cooler (20) and compressor (22) intended for compression of carbon dioxide steam supplied with cooler (20). The waste heat recuperation system also includes Rankine cycle system (14) (RCS) connected to BCS (12), with that, RCS (14) includes the first heat exchanger (28), the second heat exchanger (30) and the third heat exchanger (32). Besides, carbon dioxide steam from the first turbine (18) circulates at heat exchange with a steam-like working medium in series through the first heat exchanger (28), the second heat exchanger (30) and the third heat exchanger (32) for working medium heating. Cooler (20) is intended cool down carbon dioxide steam supplied through the first heat exchanger (28), the second heat exchanger (30) and the third heat exchanger (32). The fourth heat exchanger (34) is designed for circulation of the steam-like working medium at heat exchange with carbon dioxide steam supplied from compressor (22) for working medium heating. Carbon dioxide steam from the fourth heat exchanger (34) is heated with heater (16) of BCS (12). The second turbine (36) is designed for expansion of steam-like working medium supplied from the fourth heat exchanger (34) through the first heat exchanger (28). Condenser (38) is designed for condensation of steam-like working medium supplied from the second turbine (36) through the third heat exchanger (32). Besides, an operating method of the waste heat recuperation system is described.

EFFECT: high-efficiency recuperation of waste heat for the purpose of electricity generation.

12 cl, 3 dwg